Newton - Newton is a mobile ready, fully-featured applicant tracking system for small and medium-sized employers.
Roundcube - Web-based IMAP email client
Kalam Labs - Twitch for Science
HEY - Email at its best, new from Basecamp.
Learney - Knowledge aggregator for developers
Mailo - Mailo is an email client where you can send and receive emails to and from anyone with an email address.